Abstract: Making?use?of?geometrical?analysis?method,?the?formulas?of?elevation?change?caused?by?tower?deviation?have?been?developed.?Combining?with?the?cable-hoisting?system?of?New?Longmen?Bridge,?the?segmental?elevation?changes?are?discussed?on?deviation?of?cable-tower?and?main-tower.?The?results?show?that?the?effects?are?too?small?to?be?taken?into?consideration?for?New?Longmen?Bridge?cable-hoisting?system,?when?the?height?and?position?of?cable-tower?has?displaced.?However,?the?effect?of?main-tower?deviation?on?segmental?elevation?is?relatively?larger,?and?it?must?be?taken?into?cousideration?during?the?construction?control.?The?methods?and?analysis?results?proposed?are?of?referential?value?for?the?design?of?cable-hoisting?systems?and?the?control?of?segmental?elevation.

Key words: stent-less cable-hoisting method , geometrical analysis method , rib segmental erection, cable-tower deviation , segmental elevation

摘要： 利用几何分析法,推导了扣塔偏位对拱肋节段高程影响的计算公式。结合新龙门大桥缆吊系统,分析了扣塔 和主塔偏位对拱肋节段高程的影响。分析结果表明,新龙门大桥扣塔高度和位置的改变对高程影响很小,可忽略 不计;主塔偏位对节段高程影响相对较大,应在施工控制中加以考虑。该方法和分析结果对缆索吊装的设计和节 段安装高程控制有一定参考价值。

关键词: 无支架缆索吊装法, 几何分析法, 拱肋安装, 扣塔偏位, 节段高程